Car truck



S. P. BUSH May 14, 1929.

CAR TRUCK 2 Sheets-Sheet Filed July 20, 1926 S. P. BUSH .May 14, 1929.

CAR TRUCK Filed July 20, 1926 2 Sheets-Sheet 2 attozmgi Patented May 14, 1929;

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Application ma m ao, 1m. Serial llo. 123,110.-

This invention relates to car. trucks and especially to cast steel side frames therefor, one object of the invention being to reduce the .length of the lower or tension member 7 which is-unsupported betweenthe columns, and also reduce the widthand weight of the spring plank. Another object is to arrange the springs in a novel manner and dispose the load on the lower member of the'side' IOfra-me in a more satisfactory manner than has been heretofore done. Other-objects of;

. the invention will appear in the course of-the following description, and the nvention resides in certain novelfeatureswhlch will be particularly pointed out inthe appended ,the side frame. being cast in one integral.

' structure having an upper compression memherd, a lower compression member 5, and.

columns 6. The several "members of the side.

frame define a'central openin through which the ends of the bolster and t e spring plank are received, and journal boxes are also'preferably formed integral with the side frame at the junction of the compression and tension members. 1

According to the present invention, the opposed sides of'the columns have their lower 40 portions projected within the opening for the bolster in downwardly converging relation,

as at 7, the opening, consequently, being smaller at bottom than at the top instead of larger at the bottom as was the general practice heretofore. The distance between the lower endsrof the columns bei" thus reduced from standard practice, the ength of the lower member, unsupported between the columns is shortened the strength of the frame a is correspond'mtgl increased, The o e lower central portion tension member issubstantially V-shaped with obtuse. angle and the spring plank: has a cross-sectional outline correspondin to the upper side of the tension member an is held move- .between the side flanges of the column over the tensionmember, said-seat defining shoulment across the side-frame by inter-engaging studs and sockets, as indicated at 8' or other inter-engaging means. Near the baseof each column, a spring seat 9 is formed ders 10 formed by the lower portions of the columns and extending'a proximately to the same levelas the top 0 the spring plank. The flange 11 of the spring seat is arcuate so that it fits partly around the spring on the adjacent seat 9 as will be understood. The spring plank rests on the tension member between the shoulders 10 an d is efiectuall held against movement relative to the side f ra-me.

The springs 12 are arranged in two inter-. secting series, one series extending longitudinally of thespring plank and the other series extending longitudinall of the side frame. In the arrangement -s own in Figure 1, a spring is placed u n each spring seat 9 and two springs are p aced on the central longitudinal line of the spring plank, the springs in each series fittin partly between the springs in the other series. The bolster,

of course, extends over and rests upon all the 7 springs. By thus arranging the springs,'the

outer springs on the tension member are brought partially, if not wholly, within the lines of the columns and a more efiicient support for the tension member is provided than if the spring loads were carried entirely between the columns as heretofore. The trans-- verse stresses on the tension member between the columns are greatly reduced as well as the secondary stresses thereby set up which disadvantageously affect thetension member beyond the' columnsin the direction of the journal boxes.

In Figure 3, anarrangementbf five springs is shown,- one spring being common to both series and being the centre of the group; With this arrangement, the bolster issomewhat longer than in the arrangement shown in Figure 2 and both the bolster and the spring plank project a somewhat greater distance from the side frame but, otherwise, the construction is the same.

Having fully. described my invention what I claim as new anddesire to secure by Letters- Patent, is A 1. In a car truck, the combination of a, side frame, springs, and a bolster, said side frame comprising upper and lower members and columns defining a central opening,the 11 0 .side walls of the upper portion of said openbeing parallel to accommodatethe nor- 11 251 mgvements of thebolster, the side -wal1ls sal opening converging approximate y from lower limit of bolster movement to- P ward the lower ends of the springs.

w 2. In a car truck, a side frame comprising an. upper member, a lower member, and columns integral with the upper and lower members and defining a central opening for 1 bolster and springs, the opposed surfaces of the columns being parallel in their upper rtions and converging downwardly in t eir lower portions, and the lower member having 1. tegral, an opening between the columns for.

spring seats thereon housed within the lower springs and bblster and adapted to the locat1on of springs partially within the lines of the columns extending upward from the lower member and having spring seats for the outer orend springs above the upperline of the tension member. 5. In a car truck a side frame comprlsing anupper member, a lower member substan-' tially V-shaped, columns connectingthe up er.

= and lower members and spring seats wit in the columns, all cast int a1 and defining an opening between the coumns forbolster springs and a spring plank having end por tlons which on the underside are shaped: to

fit the contour of the central part of the lower. member between the columns, the upper sideof said end portions being on approxlmately the same level with the said spring seats.

6. In a car truck a side frame comprising an upper member, a lower'member substantially V-shaped, columns connecting the u er and lower members and spring seats withm the columns all cast integral and defining an opening between the columns for bolster s rin s and a spring plank having end r- .tibns whi h on-the under side are sha to fit the con our of the central part of the lower memberbetween the columns, the" u'pper'side:

of said-end portions being on approximately the same level with saidspring seats above the upper lineofthe tension member.

7. In a car truck, a side frame'comprising an upper member, a lower member substan; tially V-shaped, columns connecting the upper and lower members and defining an open ing between the columns for bolster 'and springs, a spring plank with end adapted to fit the contour of the lower member at the central group o springs resting on the sprin plank and-on spring seats integral. with t e side frame, said springs being-partially within the lines of the columns and substantiall on portion between the columns and a or above the level of the upper limits 0 the lower member between the columns. a

'8. In a car truck the combination of a. side frame having a compression member, a

tension member, and columns in an integral structuredefining a bolster and springpl'ank receiving opening, the columns havingtheir lower side portions extended in downwardly converging r lation,'-spring seats formed between the extpn'ded side portions of the respective columns', a springplank engaged between the spring seats, and bbls terssupporting. springs on the spring plank and the spring seats, the springs on the -sp'ringseats being partly housed-by the extended lower portions of the columns. a I

In testimony whereof, I havesigned this specification. .p

Samuel. P. BUSH, 

